All of the Following Statements About the Brown Algae Are

All of the following statements about the brown algae are true except:

A) this group includes the most complex algae that have blades, stipes, and holdfasts.
B) they share a common ancestor with representatives of the plant kingdom.
C) they represent the largest members of the algae called seaweeds.
D) they are harvested for algin, which is used in a variety of commercial products.
E) they are ecologically important as producers and in providing habitats along rocky coastlines.